jenney



3 Sheets-Sheet 1.

G. D. JENNEY. EL-EGTRIG LAMP.

(No Model.)

6 O0 8 J l m I A I m m a w P h m fl m m A 9 J 1 1 1 W H B I Z I v lltw A(No; Model.)

- 3 Shetssheet 2. C. D. JBNNEY.

ELECTRIC LAMP.

WIT JV ESSE S.

1.7V V EN TOR.

N, PETERS. P'nola-Lilhognpher. Wnhin mn. 04 C.

(No Model.) 3 Sheets-Sheet 3.

0. D. JEN'NEYJ I ELECTRIC LAMP. 7 No. 354,689. Patented Dec. 21, 1886.

:1 a nun Ill 6/1 I lllul N PETERSv Ninth-Lithographer, wuhingwn, D. C.

CHARLES D. JENNEY, OF

PATENT @FFIC a INDIANAPOLIS, INDIANA.

ELECTRIC LAMP.

SPECIFICATION forming part of Letters Patent No. 354,639, dated December21, 1886.

Application filed October 27, 1885 To all whom it may concern:

Be it known that I, CHARLEs D. Jenner, of the city of Indianapolis,county of Marion, and State of Indiana, have invented certain new anduseful Improvements in Electric Lamps, of which the following isaspecitication.

My said invention relates to that class of electric-arc lamps which areprovided with two sets of carbons, which are successively adapted to bebrought into use, whereby, owing to the double supply of carbons, lessattention is required, and which are generally known as double lamps.

The object of my invention is to produce such a lainp,in which both thecarbon-holding rods will be supported at all times when the lamp is inoperation by the magnets, and in which the several parts shall besimple, durable, and efficient in operation; and it consists in theimprovements in construction and arrangement of parts, hereinafter moreparticularly described and claimed.

Referring to the accompanying drawings, which are made a part hereof,and on which similar letters of reference indicate similar parts, Figure1 is a front elevation of a complete lamp embodying my said invention;Fig.

2, a side elevation of the upper portion thereof, as seen from thedotted line 2 2 on an enlarged scale; Fig. 3,a central verticalsectional view as seen when looking toward the right in Figs. 1 and 5and upwardly in Fig. 4 from the dotted line 3 3; Fi 4, a top or planview of so much of the lamp as is shown in Fig. 2; Fig. 5, a verticalsectional. view looking toward the left from the dotted line 5 5 inFigs.

2 and 4; Fig. 6, an under side plan of the working parts of the lamp asseen when looking upwardly from the dotted line 6 6 in Fig. 5; Fig. 7, adetail elevation of the bar K and adjacent parts, being a similar viewto a portion of Fi 5; and Fig. 8, a vertical sectional view lookingtoward the center of the lamp from the dotted line 8 8 in Fig. 4, nearlyall of the helices and some of the other portions being omitted.

In said drawings, the portions marked A represent the general frame-workof the lamp; B, asecond frame mounted upon the frame A and insulatedtherefrom, and which carries the carbon holders and governing devices;0, coarse-wirehelices orsolenoids connected with Serial No.181,052. (X0model.)

or set into the main circuit; D,line'wire helices or solenoids 'set intothe shunt-circuit; E, a coarse-wirehelix or solenoid connected to thecoarse-wire helices O; F, a resistance-coil; G, adash-pot; H H, thecarbon-holding rods; I 1, clutches therefor; J,a pivoted bar to whichsaid clutches, the piston of the dash'pot, and the fl-shapcd magnets orcores which enter the helices G and D are connected; K, a pivoted barconnected to the magnet or core of the helix E; L L, the linewires; andm, m, m", m, and at, various connecting-wires or electrical connections.

The frame A is generally of iron or other suitable metal, and carriesthe frame B and the helices Oand D, which are rigidly mounted thereon,but insulated therefrom. It is preferably of the general form shown,although able character might be employed.

The frame B is secured to the top plate of the frame A; but is insulatedtherefrom by a sheet of insulating material, a, laid over the uppersurface of said top plate, as shown most plainly in Figs. 3, 5, and 8.Upon it are mounted the pivoted bar J, the solenoid or helix E, the barK, and other portions.

The coarse-wire helices or solenoids C are rigidly and securely mountedupon the upper plate of the frame-work A, as previously stated, and areconnected with or set into the main circuit of the lamp, so as to be incircuit with the carbons when the lamp is in operation, as will behereinafter more fully eX- plainc d. The cores or magnets c of thesesolenoids are connected by a bar, 0, as shown, (see particularly Figs.1, 3, and 8,) and said two cores thus become in effect a fl-shapedmagnet, which is connected by links or rods 0 to one end of the pivotedbar J. The finewire helices or solenoids l) are similarly mounted, andare set into the shunt-circuit, as is usual. Their cores or magnets clare connected by a bar, D, and this bar is connected to the other end ofthe bar J by rods or links din like manner as is the bar 0, justdescribed.

The helix or solenoid E is secured to the frame-work B and dependstherefrom, and is connected to the main circuit in such a manner that itwill remain idle while one set of thecarbons is being consumed; but whensaid set of carbons is burned out, or is held in any the form is notessential, and any other of suitmanner from feeding, and the other hasbeen thrown into operation, a current will be sent through this helix,whereby it will be energized, and through its core or magnet e will pullup the bar K, thus changing the relative position of the steps or tripscarried by said bar and reversing the order of engagement of theclutches with the carbon-holding rods, as and with the efifecthereinafter explained.

The resistance-coil F is interposed in the cut-out circuit which isestablished when the pivoted bar J is in contact with the cut-out screw1), and gives enough resistancein said circuit to cause sufficientcurrent to pass through the helices O to enable them to pull down thepivoted bar J, and thus break said cut-out circuit, and then lift thecarbon-holding rods and establish the arc.

The piston of the dash-pot G is connected to the outer end of thepivoted bar J by its rod 9, and operates to govern the movement of saidpivoted bar in the usual and wellknown manner.

The carbon-holding rods H and HQpass up through suitable openings in theframe-work B, and are adapted to move freely up and down therein, butare prevented from dropping entirely through the frame by the collars orheads h ]L3 upon their upper ends. A certain electrical connection withsaid framework is insured by the contact-springs b', which are securedto said frame-work and rest against said rods. Said rods are providedwith suitable sockets on their lower ends for securing the carbons, andare adapted to be operated by means of the clutches I and I, as will behereinafter more fully described. It will be understood, of course,where the carbons are extended up through the lamp and separate rods aredispensed with that the operation will be the same with mylamp as in anyother where such a method is employed. It will therefore be understoodthat when I use the term carbon-holding rods or carbon rods in this caseI mean to include the construction wherein the carbons themselves formtheir own rods.

The clutches I and I each consist, essentially, of a l-shaped piece ofmetal provided with holes in its extremities, through which thecarbon-holding rod passes, and a clutch-lever, 1', havingupwardly-projecting ears,which are pivoted to the upper arm of the L]and connected at its other or outer end by means of a connecting-rod, i,with the pivoted bar J, as shown. The operation is, when the pivoted barJ is pulled down by the operation of the solenoids G to draw up theouter end of this clutch-lever 2', thus forcing its inner portionagainst one side of the carbon-holding rod and gripping said rod betweensaid clutch-lever and the main or LI-shaped portion of the device.

The pivoted bar J is mounted on apivot,j, in the frame B, and isconnected by various connecting links or rods 0 d g to the piston of thedash-pot, to the magnets or cores of the operates in connectiontherewith in the manner which will be hereinafter described.

The pivoted bar K is secured to the framework B by a pivot, k, andcarries three adj ustable screws, L It if, one of which, serves to limitits movement in a downward direction, and the others, It and k of whichserve as trips for the clutches I 1, respectively, as will be presentlymore fully described.

The incoming line-wire L, the several connecting-wires or electricalconnections m m m m m, and the outgoing line-wire L are simply the usualwires and connections over which the electrical current passes in thevarious operations of the lamp.

In order that the operation of my lamp may be clearly understood, I willbriefly indicate the electrical connections thereof. The current comesin over the line-wire L, which is secured to the lamp in any suitablemanner, (generally to the hangers A;) thence directly by means ofaconnection, 112, to the frame-work B, to which it is secured by abinding-screw,b, passing thence tothe carbon-holdingrods Hand H, beingaided in this by the contact-springs b thence down through said rods tothe carbons, and when said carbons are in contact to the lowercarbon-holders, h h,- thence up on the side of the lamp in which are thecarbonholding rod H and carbon-holder it, through a connection, m, tothe coarse-wire helices G, and up the side of the lamp in which are thecarbonholding rod H and carbon-holder It, by means of the connectionin", to the coarsewire helix E; thence by means of the connection m tothe connection m, and thus to the helices G; from said helices by meansof the connection at to the line-wire L, and out over said line-wire.Vhen the carbons carried by the carbon-holding rod H and carbon-holder hare in operation to the exclusion of the others, (the others carried bythe carbon-holding rod H and carbon-holder It being held apart or outout,) no current passes through said rod H, holder 72 its carbons, theconnections m, and the helix E, and the course of the current in thatcase is consequently from the line-wire L to the frame B, down thecarbonholding rod H, through the carbons to the carbon-holder 71,through the connection m, the helices 0, connection m and out over theline-wire L exclusively, which and the reason therefor will be "fullyunderstood from the description of the operation hereinafter.

The operation is as follows: When the circuit in which the lamp isplaced is at rest, or no current is being forced through it, or when thelamp is cut out of the circuit by means of its switch, the pivoted bar Jrests in contact with the cut-out point I), the clutches remain looselyon the carbon-holding rods, and the carbons, if in place, are incontact. Vhen the lamp is put in operation, either by turning the switchorturning on the current, said current enters the lamp, a part at firsttakes ICO each of the two courses just described, and a part also atfirst, by means of the contactpoint b, passes to and through theresistancecoil F. The resistance in this coil is enough to force asufficient portion of the current through the helices O to energize saidhelices and pull down the pivoted bar J, causing the clutches to engagewith the carbon-holding rods and lift them somewhat, thus breaking onelamp-circuit and establishing an arc in the other and lighting the lamp.At first, before the bar K has been operated, as will be presentlydescribed, the adjustable screw is somewhat higher than the adjustablescrew k, and thus holds the clutch I, which comes in contact therewithsomewhat higher than the clutch l, is held by said adjustable screw it",permitting said clutch I to drop down somewhat lower than the clutch I,and consequently, when the helices G are energized and the clutches thuslifted said clutch 1 engages with the carbon-holding rod H some whatbefore the clutch I engages with the carbon holding rod H, lifting saidcarbon-holding rod H first, and thus breaking the lamp-circuit throughits side of the lamp, and also generally lifting said rod H through agreater space than the rod H is lifted. Thus the arc is firstestablished between the carbons carried by the carbon-holding rod H andthe carbonholder 72, and said carbons are first consumed, theproperlength of are being continually reestablished between said carbonsby means of the operation of the fine-wire helices or solenoids D andthe coarse-wire helices or solenoids O in the usual and well-knownmanner. When, however, these carbons are consumed, or for any reason thefeeding of'the carbonholding rod H is interrupted, the current will beforced through the fine-wire helices D un til they are suiiicientlyenergized to pull the bar J to that point where the carbonholding rod Hwill be released, when the current will pass down through saidcarbonholding rod H, the carbon-holder h, and the carbons held thereby,and thence up through the connec tion at and through the solenoid orhelix E, which will energize said helix sufiiciently to draw up the endof the bar K, which is connected to its core, thus raising theadjustable screwk, which forms the trip for the clutch 1 above the tripfor the clutch I, whereby the clutch 1 will be tripped in operation inadvance of the clutch L The lamp circuit,in which are the carbonscarried by the rod H and holder it, will thus be brokemand the carbonscarried by the carbon-holding rod H and carbon-holder h will then beconsumed in like manner as were the others in the arrangement previouslydescribed. Should both the carbon-holdingrods become fast or both thecarbons consumed,the line-wire helices or solenoids D will becomesufficiently energized to draw down the end of the pivoted bar J untilthe other end is brought into contact with the cutout point D, and thussend the current through said cut-out point and the resistancecoil Fwithout damage to the lamp.

While the carbon-holding rods are provided with collars or headsh and Itfor the purpose of preventing them from slipping down through theframe-work, it is not intended that these heads shall serve any otherpurpose when the lamp 'is in ordinary operation than to provide againstaccident, as the design is that both of said carbon-holding rods shallat all times be supported by the magnets. From the description of thebar K and its operation it will be seen that the carbon'holding rodwhich carries the idle carbon, or the stump of the carbon which has beenconsumed so far as is practicable, is caught and lifted by the clutchesin advance of the carbon-holding rod which carries the carbon in activeoperation, and thus the weight of both the carbon-holding rods is alwayssustained by the magnets, which is very desirable, as the magnets thuscarry substantially the same load at all times, which obviously tends touniformityin their operation, and a uniform and equal operation ofthelamp' is a matter of high importance.

Having thus fully described my said invention, what I claim as new, anddesire to secure by Letters Patent, is-- 1. In a double electric lamp,the combination of two carbon'rods, a clutch for each of said rods, apivoted bar to which both of said clutches are connected, magnets foroperating said bar, a second bar. mounted on a horizon tal pivot andcarrying trips for said clutches,

and a solenoid connected to and operating said bar, said trips beingarranged to be held at different heights, whereby when said bar is inone position one of said clutches will be caused to operate in advanceof the other, and when by the action of the electric current passingthrough its operating magnet said bar is given a different position theother clutch will be caused to operate in advance of the first,substantially as and for the purposes set forth.

2. The combination, in an electric lamp, of the frame-work,carbon-holding rods mounted therein, coarse-wire helices arranged on oneside of said frame-work, connected with or set into the main circuit,fine-wire helices arranged on the other side and set into theshuntcircuit, clutches engaging with said carbon-holding rods, adash-pot, a pivoted bar extending through the frame and connected to thecores of said helices, to the piston of said dash'pot, and to saidclutches, and adjustable steps or trips for said clutches, whereby eachof said clutches may by an adjustment of said steps or trips be operatedin advance of the other, the adjustment of said stops being effected substant-ially as described, and both carbon rods being at all timessupported through their clutches by the magnets, all substantially asset forth. I 3. The combination, in an electric lamp, of the carbonrods, clutches therefor, a bar, K, mounted on a horizontal pivot, k, andprovided with stops or trips for the clutches, and a mag scribed,whereby said clutches may be opernet to whichit is connected, wherebyitis given ated, as specified, to hold the carbon rods at a verticalmovement, substantially as and for different heights, and at the sametime to susthe purposes set forth.

tain both rods continually upon the magnets,

a 4. The combination, in an electric lamp, of substantially as setforth.

the frame-work, the coarse-wire helices, the

fine-wire heliccs, the clutches, a pivoted bar hand and seal, atIndianapolis, Indiana, this to which the cores of said helices and said14th day of October, A. D. 1885.

CHARLES D. JENNEY. Witnesses:

O. BRADFORD, CHARLES L. THURBER.

clutches are connected, the carbon rods, apiv- 1o otedvertically-lnovable bar carrying trips for said clutches, a solenoidconnected to said bar, and the electrical connections hereinbefore de-In witness whereof I have hereunto set my

